SanDisk has unchained their new Extreme III PRO-HG Duo cards and they are tearing ass all over the place with superfast 30MBps read and write transfer speeds. For those of you keeping track, SanDisk's non-HG Extreme III's can only muster 18MBps speeds. Naturally, the PRO-HG will be aimed squarely at users with high end cameras and camcorders who don't mind dropping $90 and $150 on a 4GB or 8GB card. Available starting in June. [SanDisk via Electronista]